Debug notes META: needs more organization (if you grok any of the following, patches are welcome) META: there is a new compile-time option in perl-5.8.8+: -DDEBUG_LEAKING_SCALARS, which prints out the addresses of leaked SVs and new_SV() can be used to discover where those SVs were allocated. (see perlhack.pod for more info) META: httpd has quite a lot of useful debug info: http://httpd.apache.org